A body moves from a position 𝒓𝟏= (2𝒊̂-3𝐣̂-4𝐤̂ ) m to a position, r2= (3𝑖̂-43ĵ-5𝑘̂) m under the influence of a constant force F= (4𝒊̂− 4𝐣̂+ 5𝐤̂ ) N. The work done by the force is

May 10, 2022

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Physics Problems

Question: A body moves from a position 𝒓𝟏= (2𝒊̂-3𝐣̂-4𝐤̂ ) m to a position, r2= (3𝑖̂-43ĵ-5𝑘̂) m under the influence of a constant force F= (4𝒊̂− 4𝐣̂+ 5𝐤̂ ) N. The work done by the force is

(A) 57 J

(B) 58 J

(D) 60 J

Answer: Option (A)

Solution:

A body moves from a position 𝒓𝟏= (2𝒊̂-3𝐣̂-4𝐤̂ ) m to a position, r2= (3𝑖̂-43ĵ-5𝑘̂) m under the influence of a constant force F= (4𝒊̂− 4𝐣̂+ 5𝐤̂ ) N. The work done by the force is